Glass-grinding machine.



M. PORWSKA.

4 GLASS GmNn'lNG MACHINE.

APPLICATION FILED MAY B, i916.

19234562, Patented July 24,1917.

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GLASS @Hmmm MACHINE. MFLICATIQN FILED MAY 3, 1916 4 Patented July 24,1917.

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, wfrwsm. y GLASS GRKNDING MACHINE. APPLcATmN msu MAY a, 191s.

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l nue/vdo@ MARTA PORWSKA, OF BROOKLYN, NEW YORK;

GLASS-GRINDING- MACHINE.

Specicaton of Letters Patent.

Patented July 24, 191 "1.

Application filed May 8, 1916. Serial No. 96,089.

To aZZtULom z5 may concern.'

Be it known that I, MARTA Ponwsm, a citizen of Poland, residin atBrooklyn, New York, in the county of ings and Stateof New York, haveinvented certain new and useful Improvements in Glass-Grinding Machines,of which the following is a speciiication, reference being had thereinto the accompanying drawing.

My invention relates to improvements in glass beveling machines and moreparticularly has reference to and is illustrated in the accompanyingdrawings in its application as a pocket mirror beveling machine, thesame being particularly well adapted for the beveling of peripheraladjacent portions of glass disks.

In the accompanying drawings I have illustrated in Figure 1 in sideelevation partly in cross-section and partly broken away an applicationof my invention as applied to .a pocket mirror beveling machine. Fig. 2is a plan view with the superstructure removed. Fig. 3 is an end viewlooking from right to left with the superstructure removed. Fig. 4 is aplan view of the superstructure. Fig. 5is an enlarged side elevation ofa suitable work retaining device and Fig. 6 is a view looking from rightto left at the superstructure.

7 is a suitable base or flooring upon which the machine is mounted. 8 isa bed plate of the principal parts of the machine. 9 indi cates atransverse slide bearing upon which the main portion of the machine 10may be moved transversely by any suitable means such as the hand wheel11, and 12 indicates a similar longitudinal bearing to facilitate themovement of the main part 10 longitudinally by any suitable means suchas the handle 13. The main part 10 has suitably and rotatably mountedtherein a shaft 14 provided with a gear 15 which is driven by the worm16 upon the shaft 17 which in turn is provided with a pinion 18 which isdriven by the worm 19 upon the shaft 2O carrying the pulleys such as 21adapted to be driven by the belt 22 or by other suitable means.

23 is a cam permanently fixed upon the shaft 14 against which the cam 24is adapted to be driven by coil springs 25 when the opening 26 in saidcam comes in alinement with the roller bearing 27 as hereinafter moreparticularly described.

In operation the cam 24 is brought leftwardly by hand beyond the rollerbearing 27 through the opening 26 after which the cam is turned beingretained in its leftward position by the roller 27 as shown in Fig. 1.The roller 27 is pivotally mounted on the swinging bracket 28 which ispivoted to swing about the support 29, the upper end of the bracket 23being pivotally secured at 30 to the bracket 31 extending down from thecarriage 32 of the superstructure. From the foregoing it will be seenthat as the shaft 14 is rotated through the transmission hereinbeforedescribed, the thickened or enlarged portion of the cam 24 in passingover the surface of the roller 27 presses said roller and the lower endof the bracket 28 rightwardly about the support 29, thus throwing theuppen endof the bracket 28 leftwardly against the carriage 32 of thesuperstructure which feeds the glass as hereinafter described. Thisfeeding continues until the roller slips through the opening 26 in thecam 24 which thereupon being released is thrown back to the positionshown in dotted outline indicated by the reference character 24 underthe influence of the spring 25 from which position it may again be movedleftwardly as aforesaid when the next piece of work is to be operatedupon. The carriage 32 is likewise drawn leftwardly by the bracket 28secured at one end thereto and at the opposite end to support 29 asshown.

The upper end of the carriage 32 it will be observed is provided with arotatable shaft 33 carrying the driving pulleys such as 34. This shaftis preferably hollow and may be covered at the end by a suitable capsuch as 35 provided with a bleed hole 36 through which the air may becontrolled for creating a vacuum through the chuck 37 at the other endof the shaft 33. 38 indicates a glass disk such as a pocket lookingglass which may be held against the mouth of the chuck 37 by the suctionaforesaid. 39 is a suitably secured bracket provided with a slidableupper portion 40 the parts 39 and 40 having racks upon the innersurfaces as shown to engage the pinion 41 rotatable by the lever 42 sothat as the lever 42 is swung rightwardly or leftwardly looking at Fig.1, the upper portion 40 is moved to or from the disk 38. This upperportion is provided with the extending nger or arm 43 with a suitablecushion or disk 44 which clamps against the outer face of the disk 38thereby additionally securing the same against the chuck 37. 43 is asuitable stone mounted upon the pivot 44 in the end of the bearing orsupport 45 which passes through the recess 46 in the block 47 Within thetub 48 and is provided with a suitable pulley or engaging surface bywhich it is rotated by any suitable means such as the belt 49. This tubmay be suitably secured upon the base or platform 7 by any suitablemeans such as the legs or blocks such as 50.

From the foregoing it Will be seen that as the stone rotates, the glassto be beveled is fed leftwardly against the periphery of said stone, thesame becoming thereby beveled as the carriage 32 moves leftWardly theglass 38 and stone 43 being rotated simultaneously and preferablyoppositely. As each glass is beveled it is of course replaced Withanother and the machine again placed in position for feeding the same.

Of course it will be understood that various modifications may be madein the construction and arrangements of parts Without departing from thespirit of my invention as claimed.

I claim:

l. In a device of the class described a reciprocatable carriage adaptedto carry the Work to be operated upon, and adjacent one end thereof, agrindstone adapted to rotate upon an aXis at right angles to the axis ofrotation of said Work, and means beneath said carriage for reciprocatingthe same With reference to said grindstone.

2. In a device `of the class described a reciprocatable ycarriageadapted to carryr the Work to be operated upon, and adjacent one endthereof, a grindstone adapted to rotateV upon an aXis at right anglestothe axis of rotationof said Work, and means beneath said carriage forreciprocating the same with reference to said grindstone, said meanscomprising a cam'adapted to be rotated adjacent said carriage and apivoted engaging member adjacent Said carriage adapted to be operatedupon by said cam.

In testimony whereof I hereunto aiiX my signature in the presence of tWoWitnesses.

MARTA VPORW'SKA. Y

Copies of this patent may be obtained for ive cents eachZ addressing theCommissioner of vPatents, Washington, 1).0."

